Hurricane Dorian, now Category 4, continues its path toward Florida

PHOTO: Residents of Flagler Beach, Fla., fill sandbags to help protect their homes in preparation for Hurricane Dorian, Aug. 30, 2019.PlayJohn Raoux/AP
WATCH State of emergency issued in Florida for all 67 counties

Hurricane Dorian has strengthened to a Category 4 storm with 130 mph winds as Floridians brace for the extremely dangerous storm to hit.

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Dorian is forecast to make landfall along Florida's east coast on Tuesday. But because the hurricane is slow-moving, it will likely be a multi-day storm with prolonged periods of hurricane conditions, storm surge and heavy rain in Florida and parts of the Southeast.

Florida is "looking at a storm that can produce life-threatening storm surge and major hurricane-force winds," Gov. Ron DeSantis said at a Friday evening briefing. "There is a danger to your life if you remain."

Mandatory evacuations have been ordered for low-lying areas in Brevard and Martin counties starting Sunday morning, with shelters opening at the same time.

Forecast to approach Florida with winds of 140 mph, Dorian, should it make landfall at those wind speeds, would become just the ninth hurricane to do so, dating back to 1851.

PHOTO: This still images taken from NASA TV, show Hurricane Dorian as viewed from the International Space Station on August 30, 2019. NASA/AFP/Getty Images
This still images taken from NASA TV, show Hurricane Dorian as viewed from the International Space Station on August 30, 2019.

Dorian could be the biggest hurricane to hit the Miami area since Hurricane Andrew in 1992.

The latest forecast shows Dorian making landfall early Tuesday morning near West Palm Beach, but different models show the hurricane taking different paths after landfall.

PHOTO: Hurricane Dorian Forecast ABC News
Hurricane Dorian Forecast

Most models are predicting Dorian will make a sharp turn north.

If Dorian continues on that track, Orlando and Jacksonville may see heavy rain, gusty winds and significant flooding. Dorian would then move north to coastal Georgia and South Carolina, where rain, storm surge and flooding is a threat.

Other models forecast a path to the west across Florida.

PHOTO: Possible paths of Hurricane Dorian. ABC News
Possible paths of Hurricane Dorian.

Dorian is a relatively small hurricane, leaving a lot of uncertainly -- any change in the atmosphere can move the storm in a different direction or change its speed.

"No matter where the hurricane makes landfall, it could impact the majority of Florida," Peter Gaynor, acting administrator of the Federal Emergency Management Agency (FEMA), told "Good Morning America" on Friday.

PHOTO: Workers place hurricane shutters over a window as they help prepare a business for the possible arrival of Hurricane Dorian on Aug. 30, 2019, in Miami Beach, Fla. Joe Raedle/Getty Images
Workers place hurricane shutters over a window as they help prepare a business for the possible arrival of Hurricane Dorian on Aug. 30, 2019, in Miami Beach, Fla.

By Saturday, Dorian is likely to reach winds of 130 mph.

"The clock is ticking and now is the time for residents of Florida, south Georgia to make preparations," Gaynor said. "Don't take this storm lightly."

PHOTO: Workers board up a shop window front as they make preparations for the arrival of Hurricane Dorian, in Freeport, Bahamas, Friday, Aug. 30, 2019. Ramon Espinosa/AP Photo
Workers board up a shop window front as they make preparations for the arrival of Hurricane Dorian, in Freeport, Bahamas, Friday, Aug. 30, 2019.

President Donald Trump on Friday approved an emergency declaration for Florida, where a state of emergency was issued in every county.

Residents on Florida's east coast are waiting in massive lines to stock up on food, water and gas, and scrambling to board up their homes and businesses.

The University of Florida is closing its campus and canceling classes for Tuesday.

Orlando International Airport is planning to stay open through Sunday and then stop commercial flights at 2 a.m. Monday.

PHOTO: Empty shelves are seen in a drinks section of a store ahead of Hurricane Dorian in Cocoa Beach, Florida, U.S., on Thursday, Aug. 29, 2019. Zack Wittman/Bloomberg via Getty Images
Empty shelves are seen in a drink's section of a store ahead of Hurricane Dorian in Cocoa Beach, Florida, U.S., on Thursday, Aug. 29, 2019.
PHOTO: Workers cover stained glass windows with plywood sections at the Santa Maria del Mar Catholic Church in preparation for Hurricane Dorian, Aug. 30, 2019, in Flagler Beach, Fla. John Raoux/AP
Workers cover stained glass windows with plywood sections at the Santa Maria del Mar Catholic Church in preparation for Hurricane Dorian, Aug. 30, 2019, in Flagler Beach, Fla.

"We urge all Floridians to have seven days' worth of food, medicine and water," Gov. DeSantis said earlier Friday. "This is potentially a multi-day event where it'll churn slowly across the state."

"If you're in an area that has an impact from this storm, you should assume you're going to lose power," he said. "If you're in an area that flooded during Hurricane Irma [in Sept. 2017] and you're impacted by this, you should assume that you're going to see flooding again after this storm. So be prepared."

PHOTO: Shoppers wait in a long line for a Sams Club store to open before sunrise, as people rushed to buy supplies ahead of the arrival of Hurricane Dorian in Kissimmee, Florida, U.S. August 30, 2019. Gregg Newton/Reuters
Shoppers wait in a long line for a Sam's Club store to open before sunrise, as people rushed to buy supplies ahead of the arrival of Hurricane Dorian in Kissimmee, Florida, U.S. August 30, 2019.

The biggest threat will be storm surges -- ocean water pushed to shore by hurricane winds. One to 2 feet of rain is forecast for the east coast of Florida, and flash flooding is expected.

"If you're in an evacuation zone and you're ordered to evacuate, please do so," the governor said.

Trump said his administration is "working very, very hard" and is prepared to provide aid and assistance.

PHOTO: Rainfalls of 1 to 2 feet are expected through Thursday in parts of Florida. ABC News
Rainfalls of 1 to 2 feet are expected through Thursday in parts of Florida.

First, Dorian is forecast to move across the northern Bahamas on Sunday as a Category 4 storm with 130 mph.

Storm surge in the Bahamas could reach up to 15 feet and many islands are already under evacuation orders.

"Let me be extremely clear: Those who refuse to evacuate place themselves in great danger from this very powerful and potentially life-threatening hurricane," Bahamas Prime Minister Hubert Minnis said Friday. "Do not be foolish and try to brave out this hurricane."